Rolling drum heat exchanger, fan coil and control method thereof and air conditioning unit

Abstract

The application discloses a drum heat exchanger, a fan coil and a control method thereof and an air conditioning unit, wherein the drum heat exchanger comprises a heat exchanger body, the heat exchanger body is in a drum shape, the heat exchanger body comprises a plurality of heat exchange areas, and all the heat exchange areas are distributed in a circle along a center axis of the heat exchanger body; and a control valve is arranged in one-to-one correspondence with the plurality of heat exchange areas and is used for controlling opening and closing of the corresponding heat exchange area according to heat exchange needs. The application solves the problem that the heat exchanger in the prior art cannot quickly adjust temperature according to heat exchange needs, quickly meets heat exchange needs of users, and effectively saves energy consumption.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a drum heat exchanger, a fan coil unit, a control method thereof, and an air conditioning unit. Background Technology

[0002] Fan coil units are ideal terminal products for air conditioning systems and are widely used in hotels, office buildings, hospitals, commercial and residential buildings, and research institutions. They cool or heat indoor air or a mixture of indoor and outdoor air through a cooling coil before delivering it into the room, thus lowering or raising the indoor temperature to meet people's comfort requirements.

[0003] Heat exchangers in fan coil units typically exchange heat simultaneously, making it impossible to perform heat exchange in sections according to heat exchange requirements. For different heat exchange requirements, the supply air temperature can only be adjusted by regulating the temperature of the heat exchange refrigerant or the fan speed.

[0004] There is currently no effective solution to the problem that heat exchangers in related technologies cannot quickly adjust the temperature according to heat exchange needs. Summary of the Invention

[0005] This invention provides a drum heat exchanger, a fan coil unit and its control method, and an air conditioning unit, to at least solve the problem in the prior art that heat exchangers cannot quickly adjust the temperature according to heat exchange needs.

[0006] To address the aforementioned technical problems, according to one aspect of the present invention, a drum heat exchanger is provided, comprising:

[0007] The heat exchanger body is cylindrical and includes multiple heat exchange zones, all of which are distributed circumferentially around the central axis of the heat exchanger body.

[0008] Control valves are set up one-to-one with multiple heat exchange zones to control the opening and closing of the corresponding heat exchange zones according to heat exchange needs.

[0009] Furthermore, the heat exchanger body also includes at least one filtration area, and the filtration area and all heat exchange areas are distributed circumferentially around the central axis of the heat exchanger body.

[0010] Furthermore, one side of the outer surface of the heat exchanger body is connected to the return air inlet, and the other side is connected to the air outlet; the drum heat exchanger also includes:

[0011] The drive component, connected to the heat exchanger body, is used to drive the heat exchanger body to rotate around the central axis to adjust the heat exchange area and / or filtration area corresponding to the return air port and the air outlet.

[0012] According to another aspect of the present invention, a fan coil unit is provided, including the drum heat exchanger as described above.

[0013] Furthermore, it also includes:

[0014] Return air box and outlet air box; wherein, the drum heat exchanger is installed in the outlet air box;

[0015] A sealing device is installed between the cover plate of the drum heat exchanger and the air outlet box;

[0016] A heat exchanger support is mounted on the bottom plate of the air outlet box, and the drum heat exchanger is mounted on the heat exchanger support.

[0017] Furthermore, it also includes:

[0018] An air quality detector, installed inside the return air box, is used to detect the air quality index of the return air.

[0019] An ambient temperature detector is installed indoors where the fan coil unit is located to detect the ambient temperature.

[0020] According to another aspect of the present invention, a fan coil unit control method is provided, applied to the fan coil unit as described above, the method comprising:

[0021] Obtain environmental parameters and determine the operating mode of the fan coil unit based on the environmental parameters;

[0022] Control the operation of the drum heat exchanger according to the working mode.

[0023] Furthermore, the environmental parameters include at least: the temperature difference between the ambient temperature and the target temperature, and the return air quality index; the environmental parameters to be obtained include:

[0024] Acquire the target temperature and the ambient temperature detected by the ambient temperature sensor, and calculate the temperature difference between the ambient temperature and the target temperature;

[0025] Obtain the return air air quality index detected by the air quality detector.

[0026] Furthermore, the working mode includes at least:

[0027] In the heat exchange mode, the return air vent and the air outlet correspond to the heat exchange area. The heat exchange mode includes a first heat exchange mode and a second heat exchange mode. In the first heat exchange mode, the heat exchange area corresponding to the return air vent and the air outlet is fully opened. In the second heat exchange mode, the heat exchange area corresponding to the return air vent and the air outlet is partially opened.

[0028] In filtration mode, the return air vent and the air outlet correspond to the heat exchange area and the filtration area, respectively.

[0029] Furthermore, the operating mode of the fan coil unit is determined based on environmental parameters, including:

[0030] When the temperature difference between the ambient temperature and the target temperature is greater than or equal to the preset temperature, the working mode of the fan coil unit is determined to be the first heat exchange mode.

[0031] When the temperature difference between the ambient temperature and the target temperature is less than the preset temperature and the return air quality index is greater than or equal to the preset index, the working mode of the fan coil unit is determined to be the second heat exchange mode.

[0032] When the temperature difference between the ambient temperature and the target temperature is less than the preset temperature and the return air quality index is less than the preset index, the working mode of the fan coil unit is determined to be the filtration mode.

[0033] Furthermore, controlling the operation of the drum heat exchanger according to the working mode includes:

[0034] When the working mode is the first heat exchange mode, the drive device controls the heat exchange areas corresponding to the return air port and the air outlet, and controls all the switch valves of the heat exchange areas corresponding to the return air port and the air outlet to be opened.

[0035] When the working mode is the second heat exchange mode, the corresponding heat exchange areas of the return air port and the outlet air port are controlled by the drive device, and the on / off valves of the corresponding heat exchange areas of the return air port and the outlet air port are opened.

[0036] When the working mode is filtration mode, the drive device controls the heat exchange area and filtration area corresponding to the return air port and the air outlet, and controls the opening of all or part of the switch valves of the heat exchange area corresponding to the return air port and the air outlet, and the opening of the switch valves of the filtration area corresponding to the return air port and the air outlet.

[0037] According to another aspect of the present invention, an air conditioning unit is provided, including the fan coil unit as described above.

[0038] According to another aspect of the present invention, a storage medium containing computer-executable instructions is provided, which, when executed by a computer processor, are used to perform the fan coil control method as described above.

[0039] This invention provides a novel heat exchanger that is cylindrical in shape and divided into multiple heat exchange zones. Each heat exchange zone is equipped with a control valve to control the heat exchange zone in use according to heat exchange requirements. This allows for rapid temperature adjustment based on heat exchange needs, quickly reaching the target temperature to meet the user's cooling or heating requirements. It also effectively saves energy and solves the problem that existing heat exchangers have a fixed form and cannot quickly adjust the temperature according to heat exchange requirements. Attached Figure Description

[0040] Figure 1 This is an optional structural block diagram of a fan coil unit according to an embodiment of the present invention;

[0041] Figure 2 This is an optional flowchart of a fan coil unit control method according to an embodiment of the present invention;

[0042] Figure 3 This is another optional flowchart of the fan coil control method according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. First heat exchange zone; 2. Second heat exchange zone; 3. Third heat exchange zone; 4. Filtration zone; 5. Sealing device; 6. Heat exchanger support; 7. Drive component; 8. Air outlet box; 9. Air return box; 10. Air quality detector; 11. Control valve; 12. Control valve; 13. Control valve; 14. Cover plate; 15. Base plate; 16. Ambient temperature detector. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0046] Example 1

[0047] In a preferred embodiment 1 of the present invention, a drum-type heat exchanger is provided, specifically... Figure 1 This diagram illustrates one possible structure of the fan coil unit containing the rotary heat exchanger, such as... Figure 1 As shown, the drum heat exchanger includes:

[0048] The heat exchanger body is cylindrical and includes multiple heat exchange zones, all of which are distributed circumferentially around the central axis of the heat exchanger body.

[0049] Control valves are set up one-to-one with multiple heat exchange zones to control the opening and closing of the corresponding heat exchange zones according to heat exchange needs.

[0050] In the above embodiments, a novel heat exchanger is provided. The heat exchanger is cylindrical and divided into multiple heat exchange zones. Each heat exchange zone is equipped with a control valve to control the heat exchange zone in use according to heat exchange needs. This allows for rapid temperature adjustment based on heat exchange requirements, quickly reaching the target temperature to meet the user's cooling or heating needs. At the same time, it effectively saves energy and solves the problem that existing heat exchangers have a fixed form and cannot quickly adjust the temperature according to heat exchange needs.

[0051] Figure 1 The diagram shows a drum heat exchanger divided into four sections: a first heat exchange zone 1, a second heat exchange zone 2, and a third heat exchange zone 3. Each of these three heat exchange zones is equipped with control valves 11-13. Control valve 11 controls the inlet and outlet water for the first heat exchange zone, control valve 12 controls the inlet and outlet water for the second heat exchange zone, and control valve 13 controls the inlet and outlet water for the third heat exchange zone. Besides this partitioning method, the heat exchanger can also be divided into four, five, or more heat exchange zones, increasing the versatility and range of its adjustment.

[0052] like Figure 1 As shown, the heat exchanger can also be equipped with at least one filtration zone 4, and the filtration zone and all heat exchange zones are distributed circumferentially around the central axis of the heat exchanger body. The filtration zone can use air purification materials to filter air impurities and improve air quality. One or more filtration zones can also be provided as needed.

[0053] One side of the outer surface of the heat exchanger body is connected to the return air inlet, and the other side is connected to the air outlet. Under the action of the fan, the return air passes through the heat exchange area and / or the filtration area before being discharged, meeting the user's heat exchange and air quality requirements.

[0054] In order to adjust the area used by the heat exchanger, the drum heat exchanger also includes a drive component 7, which is connected to the heat exchanger body and is used to drive the heat exchanger body to rotate around the central axis, so as to adjust the heat exchange area and / or filtration area corresponding to the return air port and the air outlet, so that the heat exchanger can work in different operating modes to meet the user's heat exchange and air purification needs.

[0055] Example 2

[0056] In a preferred embodiment 2 of the present invention, a fan coil unit is provided, including a drum heat exchanger as described in embodiment 1 above.

[0057] like Figure 1 As shown, the fan coil unit also includes: a return air box 9 and an outlet air box 8; wherein, a drum heat exchanger is installed in the outlet air box; and a fan is installed in the return air box.

[0058] In addition, the air outlet box has a cover plate 14 and a bottom plate 15. A sealing device 5 is disposed between the drum heat exchanger and the cover plate of the air outlet box. The sealing device can be made of sealing sponge, which is disposed on the cover plate and contacts the heat exchanger to achieve a sealing state. The heat exchanger support 6 is disposed on the bottom plate, and the drum heat exchanger is disposed on the heat exchanger support.

[0059] like Figure 1 As shown, the fan coil unit also includes: an air quality detector 10, which is installed in the return air box to detect the return air air quality index; and an ambient temperature detector 16, which is installed in the room where the fan coil unit is located to detect the ambient temperature.

[0060] In the above embodiments, a novel heat exchanger is provided. The heat exchanger is cylindrical and divided into multiple heat exchange zones. Each heat exchange zone is equipped with a control valve to control the heat exchange zone in use according to heat exchange needs. This allows for rapid temperature adjustment based on heat exchange requirements, quickly reaching the target temperature to meet the user's cooling or heating needs. At the same time, it effectively saves energy and solves the problem that existing heat exchangers have a fixed form and cannot quickly adjust the temperature according to heat exchange needs.

[0061] Example 3

[0062] In a preferred embodiment 3 of the present invention, a fan coil unit control method is provided, which is applied to the fan coil unit in embodiment 2 above. Specifically, Figure 2 An optional flowchart of the method is shown, such as Figure 2 As shown, the method includes the following steps S202-S204:

[0063] S202: Obtain environmental parameters and determine the operating mode of the fan coil unit based on the environmental parameters;

[0064] S204: Control the operation of the drum heat exchanger according to the working mode.

[0065] In the above embodiments, a novel heat exchanger is provided. The heat exchanger is cylindrical and divided into multiple heat exchange zones. Each heat exchange zone is equipped with a control valve to control the heat exchange zone in use according to heat exchange needs. This allows for rapid temperature adjustment based on heat exchange requirements, quickly reaching the target temperature to meet the user's cooling or heating needs. At the same time, it effectively saves energy and solves the problem that existing heat exchangers have a fixed form and cannot quickly adjust the temperature according to heat exchange needs.

[0066] The environmental parameters include at least: the temperature difference between the ambient temperature and the target temperature, and the return air quality index. Acquiring these environmental parameters includes: obtaining the target temperature and the ambient temperature detected by the ambient temperature sensor, calculating the temperature difference between the ambient temperature and the target temperature, and obtaining the return air quality index detected by the air quality detector. Based on the structural configuration of the fan coil unit, namely the heat exchange area and the filtration area, temperature and air quality parameters are used in the control of the fan coil unit to achieve temperature regulation and air quality improvement.

[0067] Based on this, the operating modes of fan coil units include at least the following modes:

[0068] In heat exchange mode, the return air vent and the air outlet correspond to the heat exchange area; that is, when only heat exchange is needed and air purification is not considered, the heat exchanger opposite the return air vent and the air outlet is the heat exchange area. The heat exchange mode can also be divided into a first heat exchange mode and a second heat exchange mode. In the first heat exchange mode, the heat exchange areas corresponding to the return air vent and the air outlet are fully open, enabling relatively rapid heat exchange. In the second heat exchange mode, the heat exchange areas corresponding to the return air vent and the air outlet are partially open, suitable for situations with lower heat exchange requirements. Therefore, the two modes can be used to quickly exchange heat as needed to meet user needs.

[0069] In filtration mode, the return air vent and the air outlet correspond to the heat exchange area and the filtration area, respectively. This mode can be used for applications requiring air purification, where the air outlet corresponds to the heat exchange area and the return air vent to the filtration area, or vice versa. Alternatively, both the return air vent and the air outlet can correspond to the filtration area, but this mode does not provide heat exchange; it only purifies the air.

[0070] The following implementation method can be used to determine the operating mode of the fan coil unit and control the operation of the drum heat exchanger based on environmental parameters:

[0071] 1) When the temperature difference between the ambient temperature and the target temperature is greater than or equal to the preset temperature, the working mode of the fan coil unit is determined to be the first heat exchange mode; when the working mode is the first heat exchange mode, the corresponding heat exchange areas of the return air port and the outlet air port are controlled by the drive device, and all the switch valves of the corresponding heat exchange areas of the return air port and the outlet air port are opened.

[0072] 2) When the temperature difference between the ambient temperature and the target temperature is less than the preset temperature and the return air quality index is greater than or equal to the preset index, the working mode of the fan coil unit is determined to be the second heat exchange mode; when the working mode is the second heat exchange mode, the corresponding heat exchange areas of the return air outlet and the air outlet are controlled by the drive device, and the opening and closing valves of the corresponding heat exchange areas of the return air outlet and the air outlet are controlled to open.

[0073] 3) When the temperature difference between the ambient temperature and the target temperature is less than the preset temperature and the return air quality index is less than the preset index, the fan coil unit's operating mode is determined to be the filtration mode. In filtration mode, the drive device controls the corresponding heat exchange and filtration areas at the return and outlet air vents, and controls the opening of all or part of the valves in the heat exchange areas corresponding to the return and outlet air vents, while opening the valves in the filtration areas corresponding to the return and outlet air vents.

[0074] In a preferred embodiment 2 of the present invention, another fan coil unit control method is also provided, specifically... Figure 3 An optional flowchart of the method is shown, such as Figure 3As shown, the method includes the following steps S301-S313:

[0075] S301: Begin;

[0076] S302: Temperature detection, determining the actual indoor temperature through an ambient temperature detection device;

[0077] S303: Control Center. The detected temperature is fed back to the control center, which then executes the following controls; the following controls are as follows: Figure 1 Taking this as an example, it includes three heat exchange zones and one filtration zone;

[0078] S304: If the difference between the measured temperature and the preset temperature (target temperature) is ≥10℃, proceed to step S305; 10℃ is just an example for illustration, and the temperature difference can be set as needed in actual use;

[0079] S305: The drive unit starts, rotates the heat exchanger, and enters the dual heat exchanger working mode. When the difference between the measured temperature and the preset temperature is ≥10℃, the drive unit starts, rotates the drum heat exchanger, and enters the dual heat exchanger working mode. That is, the outside air is drawn in by the fan and blown out, passes through the first heat exchange area and the third heat exchange area for heat exchange, and is then blown out into the room.

[0080] S306: Control valves 11 and 13 are opened, then proceed to step S313; In the dual heat exchanger working mode, control valves 11 and 13 are opened, and water flows through the copper tubes of the heat exchanger for heat exchange. The dual heat exchanger working mode allows the temperature to quickly reach the preset temperature.

[0081] S307: If the difference between the measured temperature and the preset temperature is less than 10℃, proceed to step S308;

[0082] S308: Air quality detection, the return air air quality index is detected by an air quality detector; if the return air air quality index is higher than the standard by 60%, proceed to step S309, otherwise proceed to step S311;

[0083] S309: The drive unit starts, rotates the heat exchanger, and enters the single heat exchanger working mode; when the difference between the measured temperature and the preset temperature is <10℃, the air quality detector is turned on; when the air quality index is higher than 60% of the standard, the drive unit starts, rotates the drum heat exchanger, and enters the single heat exchanger working mode.

[0084] S310: Control valve 11 is closed and control valve 13 is opened. Then, proceed to step S313. In the single heat exchanger working mode, the position of the drum heat exchanger is the same as in the double heat exchanger working mode. The difference is that control valve 11 is closed and control valve 13 is open. At this time, only one heat exchanger has heat exchange capacity, which saves resources.

[0085] S311: The drive unit starts, rotates the heat exchanger, and enters the single heat exchanger filtration mode; when the difference between the measured temperature and the preset temperature is less than 10℃, and when the air quality index is less than 60% of the standard, the drive unit starts, rotates the drum heat exchanger, and enters the single heat exchanger filtration mode; in the single heat exchanger filtration mode, the filtration area is located at the return air inlet, and the second heat exchange area is located at the air outlet. That is, the outside air is drawn in by the fan, passes through the filtration area, and then passes through the second heat exchange area for heat exchange before entering the room.

[0086] S312: Control valves 11 and 13 are closed, and control valve 12 is opened. Then, proceed to step S313. In the single heat exchanger filtration mode, control valves 11 and 13 are closed, and control valve 12 is opened. This mode has both filtration and heat exchange functions. To extend the life of the filter screen in the filtration area, the filtration mode is only activated when the air quality is poor, greatly reducing the frequency of filter replacement.

[0087] S313: The fan starts running; after a preset interval, it returns to S302.

[0088] The aforementioned fan coil unit and its control method adjust the heat exchanger's operating mode according to the actual temperature difference to achieve rapid cooling or heating. At the same time, the heat exchanger's operating mode is adjusted according to changes in air quality to filter air impurities, thereby improving both heat exchange efficiency and air quality.

[0089] Example 4

[0090] Based on the fan coil unit provided in Embodiment 3 above, an air conditioning unit is also provided in a preferred embodiment 4 of the present invention, including the fan coil unit as described above.

[0091] In the above embodiments, a novel heat exchanger is provided. The heat exchanger is cylindrical and divided into multiple heat exchange zones. Each heat exchange zone is equipped with a control valve to control the heat exchange zone in use according to heat exchange needs. This allows for rapid temperature adjustment based on heat exchange requirements, quickly reaching the target temperature to meet the user's cooling or heating needs. At the same time, it effectively saves energy and solves the problem that existing heat exchangers have a fixed form and cannot quickly adjust the temperature according to heat exchange needs.

[0092] Example 5

[0093] Based on the fan coil control method provided in Embodiment 3 above, in a preferred embodiment 5 of the present invention, a storage medium containing computer-executable instructions is also provided, wherein the computer-executable instructions are used to execute the fan coil control method as described above when executed by a computer processor.

[0094] In the above embodiments, a novel heat exchanger is provided. The heat exchanger is cylindrical and divided into multiple heat exchange zones. Each heat exchange zone is equipped with a control valve to control the heat exchange zone in use according to heat exchange needs. This allows for rapid temperature adjustment based on heat exchange requirements, quickly reaching the target temperature to meet the user's cooling or heating needs. At the same time, it effectively saves energy and solves the problem that existing heat exchangers have a fixed form and cannot quickly adjust the temperature according to heat exchange needs.

[0095] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented by the invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0096] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A drum heat exchanger, characterized in that, include: The heat exchanger body is cylindrical and includes multiple heat exchange zones, all of which are circumferentially distributed around the central axis of the heat exchanger body. Control valves are provided one-to-one with the plurality of heat exchange zones and are used to control the on / off state of the corresponding heat exchange zone according to heat exchange requirements. The heat exchanger body further includes: at least one filtration area, wherein the filtration area and all the heat exchange areas are circumferentially distributed about the central axis of the heat exchanger body; One side of the outer surface of the heat exchanger body is connected to the return air inlet, and the other side is connected to the air outlet. The drum heat exchanger also includes a driving component connected to the heat exchanger body for driving the heat exchanger body to rotate about the central axis to adjust the return air inlet and the air outlet to correspond to the heat exchange area and / or the filtration area.

2. A fan coil unit, characterized in that, Including the drum heat exchanger as described in claim 1.

3. The fan coil unit according to claim 2, characterized in that, Also includes: A return air box and an outlet air box; wherein the drum heat exchanger is disposed in the outlet air box; A sealing device is provided between the cover plate of the drum heat exchanger and the air outlet box; A heat exchanger support is mounted on the bottom plate of the air outlet box, and the drum heat exchanger is mounted on the heat exchanger support.

4. The fan coil unit according to claim 3, characterized in that, Also includes: An air quality detector is installed inside the return air box to detect the return air air quality index; An ambient temperature detector is installed indoors where the fan coil unit is located to detect the ambient temperature.

5. A fan coil unit control method, characterized in that, Applied to a fan coil unit as described in any one of claims 2 to 4, the method comprises: Obtain environmental parameters and determine the operating mode of the fan coil unit based on the environmental parameters; Control the operation of the drum heat exchanger according to the described working mode.

6. The method according to claim 5, characterized in that, The environmental parameters include at least: the temperature difference between the ambient temperature and the target temperature, and the return air quality index; the acquisition of environmental parameters includes: The target temperature and the ambient temperature detected by the ambient temperature sensor are obtained, and the temperature difference between the ambient temperature and the target temperature is calculated. Obtain the return air air quality index detected by the air quality detector.

7. The method according to claim 6, characterized in that, The operating modes include at least: The heat exchange mode is defined as follows: the return air vent and the air outlet correspond to heat exchange areas. The heat exchange mode includes a first heat exchange mode and a second heat exchange mode. In the first heat exchange mode, all heat exchange areas corresponding to the return air vent and the air outlet are opened. In the second heat exchange mode, the heat exchange areas corresponding to the return air vent and the air outlet are partially opened. In the filtration mode, the return air vent and the air outlet correspond to the heat exchange area and the filtration area, respectively.

8. The method according to claim 7, characterized in that, Determining the operating mode of the fan coil unit based on the environmental parameters includes: When the temperature difference between the ambient temperature and the target temperature is greater than or equal to the preset temperature, the working mode of the fan coil unit is determined to be the first heat exchange mode. When the temperature difference between the ambient temperature and the target temperature is less than the preset temperature and the return air quality index is greater than or equal to the preset index, the working mode of the fan coil unit is determined to be the second heat exchange mode. When the temperature difference between the ambient temperature and the target temperature is less than the preset temperature and the return air quality index is less than the preset index, the working mode of the fan coil unit is determined to be the filtration mode.

9. The method according to claim 7, characterized in that, Controlling the operation of the drum heat exchanger according to the aforementioned working mode includes: When the working mode is the first heat exchange mode, the drive device controls the return air port and the air outlet to correspond to the heat exchange area, and controls all the switch valves of the heat exchange area corresponding to the return air port and the air outlet to be opened. When the working mode is the second heat exchange mode, the drive device controls the return air port and the air outlet to correspond to the heat exchange area, and controls the opening of the switch valves of the heat exchange area corresponding to the return air port and the air outlet. When the working mode is the filtration mode, the drive device controls the return air port and the air outlet to correspond to the heat exchange area and the filtration area, and controls the switching valves of the heat exchange area corresponding to the return air port and the air outlet to be fully or partially opened, and the switching valves of the filtration area corresponding to the return air port and the air outlet to be opened.

10. An air conditioning unit, characterized in that, Includes the fan coil unit as described in any one of claims 2 to 4.

11. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the fan coil control method as described in any one of claims 5 to 9.

Images